One isn't "true" and the other "false". One is original, to be sure, but both are fiction.

But that's rather beside the point. A film is there to tell a story in as engaging, entertaining and successful way as possible. It won't all be successful or universally liked but that's its job. Not to act as a reference book.

It bothers me no more than the thought someone is still reading a 1st edition hobbit.